436 A.2d 1075 Township of Coal, Appellant v. Helen Berthelsen Willis, Appellee. Commonwealth Court of Pennsylvania.Argued September 18, 1981 November 13, 1981. Zoning — Scope of appellate review — Abuse of discretion — Error of law — Variance — Burden of proof — Unnecessary hardship — Side yard requirements. 1. In a zoning case where […]